This standard specifies that particles of 1 nm or more and 100 nm exist dispersed and immobilized on a carrier (e.g., supported metal catalysts) and as metal colloids alone or dispersed in a medium (e.g., metal colloid suspensions). This article stipulates common items when measuring the particle size of metal catalysts made of metal elements with the following particle sizes using electron microscopy and the crystallite size using X-ray diffraction.
JIS H 7803:2005 history
2005JIS H 7803:2005 General rules for the determination of particle size and crystallite size in metal catalysts